Related notes:

Suggested Features which benefit accessibility fall into two groups: (1) those features which have been explicitly created to aid accessibility, possibly in an attempt to follow guidelines such as these; or (2) those which assist accessibility but emerge from other functionality not originally created for accessibility purposes. Further, these accessibility benefits may be explicit such as the ability to control the User Agent from the keyboard; or implicit such as the ability to style a page based on a user supplied style sheet.